Water pump



Aug. 4, 1931. L. SCHWITZER ET AL 1,317,169

4 WATER PUMP Filed Nov. 11, 1929 2 Sheets-Sheet l I N VEN TORS ATTORNEY-5.

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WATER PUMP .7 Filed Nov. 11, 1929 2 Sheets-Sheet 2 I N VEN TORS- 100/5 scaly/r254. (39kt I W/NMER.

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v Patented Aug. 4, 1931 UNITED STATES PATENT OFFICE" LOUIS SCH WITZEB AND CARL J. WINKL ER, OF INDIANAPOLIS, INDIANA, ASSIGNOBS 'TO SCHWITZER-CUMMINS COMPANY, OF INDIANAPOLIS, INDIANA, A QOBPOBA- Application filed November This invention relates to a water pump and particularly a centrifugal type of pump used in the water cooling system of internal combustion engines, although the invention is not necessarily limited thereto.

The purpose of this invention is to provide a more efiicient type of pump of this general character which will have the advantages of the centrifugal type of pump while at the same time greatly increasing the efliciency thereof and particularly the quantity and velocity of the water pumped thereby through a circulating system.

One feature of the invention resides in the arrangement of the water intake with respect to an impeller and the outlet. This invention contemplates-a peripheral intake as distinguished from the usual lateral intake, as well as a peri heral outlet, the course a flow of the water eing slightly angular,

ydirected into the impeller ad acent the pei, riphery thereof and continuing its peripheral itraveh about the housing and out from the periphery thereof. As will be noted, the inlet is in theperiphery of the housing to oneside of the impeller and outlet, and the water passage formedin the housing is such as'to cause the- .water to spiral about the periphery'thereof into the plane of the impeller and outlet.

By means of this-arrangement there is a peripheral flow of water of a spiral characteras distinguished from the usual cen trifugal How of an angular character. In other words, there is no angular change in the directionof floW'as in the us'ualtype of centrifugal pump. Herein the water enters in the direction of travel of the impelleras V distinguished from entering-at right angles thereto. Furthermore, it enables the water WATER PUMP 11, 1929. Serial no. 406,238.

to be discharged tangentially from the end The full nature of the invention will be more clearly understood from the accompanying drawin and the following description and claim:

Fig. 1 is a central vertical section through the pump with the impeller and cover plate mounted thereon. Fig. 2 is an internal view of the pump housing with the impeller removed. Fig. 3 is a section taken on-the line 3-3 of'Fig. 2. Fig. 4 is a reduced section taken on the line 4-4 of Fig. 1.

In the drawings there is shown in section a pump having a supporting bracket 10 formed integral with a cover plate 11 adapted to be rigidly secured to the pump housing 12. The pump is driven bythe usual means not shown herein through the drive shaft 13and is supported in suitable bushings 14 in the cover plate, and 15 in the pump housing. The

usual packing 16 is provided for preventing leakage along the shaft. Rigidly secured upon the shaft there is an impeller 17 pro-' vided with radially extending blades 18 adapted to rotate freel within the main annular chamber 19 of t e pump housing.

The water inlet 20 communicates with the periphery of the -spiral chamber 21 formed with a spirally disposed peripheral passage within the pump housing adjacent to but at one side of the main chamber 19; or if desired, double inlets may be employed, one on each side of the main chamber.- The outlet 22. communicates directly with the periphery of the main chamber 19 in the same plane thereof. I a

As best illustrated in Figs. 2 and 3 e,

water passes from the inlet 20 into the spiral chamber 21 to one side of the plane'of rotation of the impeller. Inasmuch as the inlet is tangential, the velocity of the water causes it to flow about the peripheral wall thereof.

By reason of the formation of the outer wall of the chamber 21 with a shoulder 23, in conjunction with the inwardly extending peripheral fin 24 partially separating the two chambers, the peripheral flow of water is directed toward the periphery of the main chamber and. in engagement with the outer ends of the vanes 19 of the impeller which caused its peripheral flow to be continued about the peripheral wall of the main chamber until it escapes through the outlet 22 communicating therewith.

From the foregoing it will be noted tha the flow of the water is generally maintained in a peripheral directionand no right angle change of direction occurs. The flow is capsed' by engagement only with the more swiftly moving peripheral ends of the impeller as distinguished from entering the impeller through the center thereof, which increases I the velocity of the water moving from the inlet to the outlet. Thus, resistance to the flow is minimized and the velocity is directly responsive to'the. s eed of'the ends of the impellerlilades which is increased directly with the increase of the diameter thereof, and

the diameter of the impeller being limited only by the internal diameter of the pump houslng.

The invention claimed is:

A pump of the character described having a housing forming a main chamber, an outlet conduit communicating therewith, an impeller rotatably mounted in said chamber, an intake chamber formed at one side thereof, a peripheral fin extending inwardly from said housing partially separating said chain-- bers, said intake chamber being provided with a sloping outer wall terminating in said fin for f0 mi'ng in conjunction therewith'a substantial y spiral. assage communicating with said main cham er.

In witness whereof, we have hereunto affixed our signatures. 9 a

- LOUIS SCHWITZER.

CARL .WINKLER. 

